package com.itheima.user.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.user.mapper.ApUserInfoMapper;
import com.itheima.user.pojo.ApUserInfo;
import com.itheima.user.service.ApUserInfoService;
import org.springframework.stereotype.Service;

/**
 * <p>
 * APP用户信息表 服务实现类
 * </p>
 *
 * @author 作者
 * @since 2021-08-20
 */
@Service
public class ApUserInfoServiceImpl extends ServiceImpl<ApUserInfoMapper, ApUserInfo> implements ApUserInfoService {

    public static void main(String[] args) {
        String a = "a";
        String b = "b";
        String c = a+b;
        String d = "a" + "b";
        String e = "a" + b;

        System.out.println(c==d);
        System.out.println(c==e);
        System.out.println(e==d);

    }

}
